var employees = [
    {
        id:1, // 不出现在页面上
        name:'Mary',
        gender:'female',
        dept:'HR'

    },  {
        id:1,
        name:'Lee',
        gender:'male',
        dept:'DEV'
    }  ,{
        id:1,
        name:'F',
        gender:'female',
        dept:'HR'
    }
]